The Drummond Island mining operation is run by Carmeuse Lime & Stone. I spoke with Ray LeClair, Carmeuse Lime & Stone's Director of Operations. He oversees the operations in the Great Lakes region including the Drummond Island operation.

LeClair said the mining site on Drummond Island has been open since the late 1940s and after checking the report from June 28, 2016, they found "nothing abnormal about the report" and he was "not quite sure why it registered."

LeClair said the blast was similar to others that they do on the island about ten times each year.

The mining site is about 8 miles inland at the east end of Truck Haul Road.